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The Windows Update error 0x80070306 in Windows 10 and Windows 11 occurs when the system fails to download, install, or apply updates. This error is typically caused by issues related to system files, update components, or network problems. Below are the common causes:
1. Corrupted or Missing System Files

Windows relies on critical system files to apply updates. If these files are corrupted or missing, the update process can fail, leading to error 0x80070306.

2. Issues with Windows Update Components

Corruption or misconfiguration in essential update components, such as the Windows Update service or the SoftwareDistribution folder, can disrupt the update process.

3. Network Connectivity Problems

A slow or unstable internet connection can cause update downloads to fail, especially if the connection drops during the process.

4. Outdated or Corrupted Device Drivers

Certain updates require compatible and up-to-date drivers. If drivers are outdated or corrupt, they can conflict with the update process.

5. Incomplete or Failed Previous Updates

If a previous update was interrupted or failed, it might leave the system in an inconsistent state, causing future updates to fail with error 0x80070306.

Troubleshooting Steps to Fix Error 0x80070306

Run the Windows Update TroubleshooterGo to Settings - System -Troubleshoot - Other troubleshooters and select Windows Update. The troubleshooter will automatically detect and attempt to fix update-related issues.


Run System File Checker (SFC) and DISMOpen Command Prompt as an administrator and run:

sfc /scannowDISM /Online /Cleanup-Image /RestoreHealth

Link: https://www.microsoft.com/en-us/software-download/windows11

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CHAPTERS
00:00 Intro
00:18 Solution 1
01:22 Solution 2
02:20 Solution 3
03:44 Solution 4
05:28 Solution 5
06:54 Solution 6
09:50 Outro